Eccotemp 40H-LP Outdoor Propane Tankless Water Heater, 135,000 British Thermal Unit 6.3 GPM, 110 volt power supply Flow rate of 6.0 GPM at 35 degree rise, 4.57 GPM at 45 degree rise, 2.6 GPM at a 77 degree rise Built-in antifreeze circuit 135,000 BTU's Digital remote with simple controls and diagnostics